I was thinking about that topic too. I came to the conclusion its better without case.
If you leave it in its case, think about the screen orientation, the monitor is desgined to work like it is. Which is normaly not any problem but think about heat - the case of the screen is designed to let the heat pass by -in its designed way- if you flip the screen e.g. by 90 degress it might not work for long because the heat cant leave the case as intended. -Thats just a guess, cause screens normaly can cope with a bit more heat than normal.

For me the most interssting point was the thinkness i could safe without the case, after removing the case i found another nice great thing, i could move the Display controller to a total different place, i will place it next to the screen but need a few new cables for that (ordered them already) in the end i will safe another big chunk in thickness.